SELinux: unrecognized netlink message: protocol=0 nlmsg_type=112 sclass=netlink_route_socket pig=10005 comm=security
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BUG: KASAN: slab-out-of-bounds in sctp_send_reset_streams+0xadf/0xc10 net/sctp/stream.c:314
Read of size 2 at addr ffff8801c36029c8 by task syz-executor1/10022

CPU: 1 PID: 10022 Comm: syz-executor1 Not tainted 4.15.0-rc3+ #131
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x194/0x257 lib/dump_stack.c:53
 print_address_description+0x73/0x250 mm/kasan/report.c:252
 kasan_report_error mm/kasan/report.c:351 [inline]
 kasan_report+0x25b/0x340 mm/kasan/report.c:409
 __asan_report_load2_noabort+0x14/0x20 mm/kasan/report.c:428
 sctp_send_reset_streams+0xadf/0xc10 net/sctp/stream.c:314
 sctp_setsockopt_reset_streams net/sctp/socket.c:3905 [inline]
 sctp_setsockopt+0x70d/0x5d50 net/sctp/socket.c:4195
 compat_sock_common_setsockopt+0x104/0x140 net/core/sock.c:2981
 C_SYSC_setsockopt net/compat.c:403 [inline]
 compat_SyS_setsockopt+0x17c/0x410 net/compat.c:386
 do_syscall_32_irqs_on arch/x86/entry/common.c:327 [inline]
 do_fast_syscall_32+0x3ee/0xf9d arch/x86/entry/common.c:389
 entry_SYSENTER_compat+0x51/0x60 arch/x86/entry/entry_64_compat.S:125
RIP: 0023:0xf7fc0c79
RSP: 002b:00000000f77bc08c EFLAGS: 00000296 ORIG_RAX: 000000000000016e
RAX: ffffffffffffffda RBX: 0000000000000014 RCX: 0000000000000084
RDX: 0000000000000077 RSI: 0000000020222000 RDI: 0000000000000008
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000

Allocated by task 10022:
 save_stack+0x43/0xd0 mm/kasan/kasan.c:447
 set_track mm/kasan/kasan.c:459 [inline]
 kasan_kmalloc+0xad/0xe0 mm/kasan/kasan.c:551
 __do_kmalloc mm/slab.c:3711 [inline]
 __kmalloc_track_caller+0x15e/0x760 mm/slab.c:3726
 memdup_user+0x2c/0x90 mm/util.c:164
 sctp_setsockopt_reset_streams net/sctp/socket.c:3897 [inline]
 sctp_setsockopt+0x6a6/0x5d50 net/sctp/socket.c:4195
 compat_sock_common_setsockopt+0x104/0x140 net/core/sock.c:2981
 C_SYSC_setsockopt net/compat.c:403 [inline]
 compat_SyS_setsockopt+0x17c/0x410 net/compat.c:386
 do_syscall_32_irqs_on arch/x86/entry/common.c:327 [inline]
 do_fast_syscall_32+0x3ee/0xf9d arch/x86/entry/common.c:389
 entry_SYSENTER_compat+0x51/0x60 arch/x86/entry/entry_64_compat.S:125

Freed by task 3235:
 save_stack+0x43/0xd0 mm/kasan/kasan.c:447
 set_track mm/kasan/kasan.c:459 [inline]
 kasan_slab_free+0x71/0xc0 mm/kasan/kasan.c:524
 __cache_free mm/slab.c:3491 [inline]
 kfree+0xca/0x250 mm/slab.c:3806
 security_context_to_sid_core+0x3c3/0x620 security/selinux/ss/services.c:1459
 security_context_to_sid_force+0x33/0x40 security/selinux/ss/services.c:1516
 selinux_inode_post_setxattr+0xf0/0x390 security/selinux/hooks.c:3252
 security_inode_post_setxattr+0xca/0x120 security/security.c:749
 __vfs_setxattr_noperm+0x2cd/0x390 fs/xattr.c:184
 vfs_setxattr+0xd3/0xe0 fs/xattr.c:224
 setxattr+0x2f7/0x3e0 fs/xattr.c:453
 path_setxattr+0x198/0x1e0 fs/xattr.c:472
 SYSC_lsetxattr fs/xattr.c:494 [inline]
 SyS_lsetxattr+0x38/0x50 fs/xattr.c:490
 entry_SYSCALL_64_fastpath+0x1f/0x96

The buggy address belongs to the object at ffff8801c36029c0
 which belongs to the cache kmalloc-32 of size 32
The buggy address is located 8 bytes inside of
 32-byte region [ffff8801c36029c0, ffff8801c36029e0)
The buggy address belongs to the page:
page:000000007e719b45 count:1 mapcount:0 mapping:00000000ced689a1 index:0xffff8801c3602fc1
flags: 0x2fffc0000000100(slab)
raw: 02fffc0000000100 ffff8801c3602000 ffff8801c3602fc1 000000010000003f
raw: ffffea0007301060 ffffea00070d82e0 ffff8801db0001c0 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8801c3602880: 00 00 00 fc fc fc fc fc fb fb fb fb fc fc fc fc
 ffff8801c3602900: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc
>ffff8801c3602980: fb fb fb fb fc fc fc fc 00 fc fc fc fc fc fc fc
                                              ^
 ffff8801c3602a00: 00 00 00 00 fc fc fc fc fb fb fb fb fc fc fc fc
 ffff8801c3602a80: 00 00 01 fc fc fc fc fc fb fb fb fb fc fc fc fc
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